Bone growth of the epiphysis occurs at the ________.
A. diaphysis
B. perichondrium
C. articular cartilage
D. joint cavity
E. epiphyseal plate
Answer: C
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Imagine that codons consisted of two bases instead of three, but there were still 20 amino acids. In this scenario, which of the statements below would be true (a), and which would be false (b)?
_____ There would still be enough codons to maintain the fidelity of the genetic code and provide stop codons. _____ Redundancy would be eliminated; in fact, there would not be enough two-base codons to specify all 20 acids or act as stop codons. _____ Most codons would probably specify a single amino acid, but if there were still 20 amino acids, then some codons would have to specify more than one amino acid or an amino acid and a stop codon.
Frequently, several different signals or molecules are needed in order to produce an immune response by a B cell or T cell. The second signal in this process is called ________.
A. complement activation B. opsonization C. antigen processing D. costimulation E. copresentation
When you are outside on a hot, humid day, what body changes occur to help your body temperature return to normal?
a. The blood vessels in your skin constrict. b. The sweat glands release sweat. c. Nerve impulses are sent to muscles to cause shivering. d. The smooth muscle associated with hair follicles contracts, causing goose bumps.
A fibrous joint cannot also be which of the following?
A. A gomphosis B. A synarthrosis C. A suture D. A diarthrosis